The official United States Air Force flag was adopted by President Harry S. Truman on March 26, 1951. This flag shows the Air Force coat of arms centered on a blue background, surrounded above by a semi circle of 13 white stars. The stars represent the original 13 colonies, with the 3 grouped at the top also representing the three Departments of the National Defense Establishment (Army, Navy & Air Force). Typically indoor or parade flags will be decorated with gold fringe and outdoor flags are without fringe.